Lightweight, long-lasting portable oxygen concentrators are vital for people with COPD and other respiratory conditions. Portable oxygen concentrators provide stable and reliable airflow for long periods of time, and they can also be taken on the road to help people maintain their independence. If your doctor has recommended home oxygen therapy, then choosing the right oxygen concentrator is essential. Oxygen output, battery life, size and weight are all important factors. We've evaluated several of the leading oxygen concentrator models to bring you our top three: the SeQual eQuinox, the GCE Zen-O, and the Respironics SimplyGo. Search our top picks for the best portable oxygen concentrators on the market today. Get outside and breathe easy.